viscoplasticity
Sign in to savethumb|upright=1.1|Figure 1. Elements used in one-dimensional models of viscoplastic materials.
Wikidata facts
Show 1 more fact
- Commons category
- Viscoplasticity
Sources (2)
via Wikidata · CC0
~31 min read
Article
20 sectionsContents
- History
- Phenomenology
- Strain hardening test
- Creep test
- Relaxation test
- Rheological models of viscoplasticity
- Perfectly viscoplastic solid (Norton-Hoff model)
- Elastic perfectly viscoplastic solid (Bingham–Norton model)
- Elastoviscoplastic hardening solid
- Strain-rate dependent plasticity models
- Perzyna formulation
- Duvaut–Lions formulation
- Flow stress models
- Johnson–Cook flow stress model
- Steinberg–Cochran–Guinan–Lund flow stress model
- Zerilli–Armstrong flow stress model
- Mechanical threshold stress flow stress model
- Preston–Tonks–Wallace flow stress model
- See also
- References
thumb|upright=1.1|Figure 1. Elements used in one-dimensional models of viscoplastic materials.
Viscoplasticity is a theory in continuum mechanics that describes the rate-dependent inelastic behavior of Solids. Rate-dependence in this context means that the deformation of the material depends on the rate at which loads are applied. The inelastic behavior that is the subject of viscoplasticity is plastic deformation which means that the material undergoes unrecoverable deformations when a load level is reached. Rate-dependent plasticity is important for transient plasticity calculations. The main difference between rate-independent plastic and viscoplastic material models is that the latter exhibit not only permanent deformations after the application of loads but continue to undergo a creep flow as a function of time under the influence of the applied load.